dect
/
linux-2.6
Archived
13
0
Fork 0
Code Releases Activity

isci: have the driver use native SG calls and DMA-API 

Remove abstraction for SG building and get rid of callbacks for getting
DMA memory mapping.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dave Jiang 2011-02-23 15:57:27 -08:00 committed by Dan Williams
parent 103a00c200
commit 6389a77596
7 changed files with 236 additions and 219 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/scsi/isci/core/sci_util.c
View File

@ -84,3 +84,18 @@ void *scic_request_get_virt_addr(struct scic_sds_request *sci_req, dma_addr_t ph
return (char *)ireq + offset;
}
dma_addr_t scic_io_request_get_dma_addr(struct scic_sds_request *sds_request,
void *virt_addr)
{
struct isci_request *isci_request =
(struct isci_request *)sci_object_get_association(sds_request);
char *requested_addr = (char *)virt_addr;
char *base_addr = (char *)isci_request;
BUG_ON(requested_addr < base_addr);
BUG_ON((requested_addr - base_addr) >=
isci_request->request_alloc_size);
return isci_request->request_daddr + (requested_addr - base_addr);
}

3
drivers/scsi/isci/core/sci_util.h
View File

@ -102,4 +102,7 @@ void scic_word_copy_with_swap(u32 *destination, u32 *source, u32 word_count);
void *scic_request_get_virt_addr(struct scic_sds_request *sds_request,
dma_addr_t phys_addr);
dma_addr_t scic_io_request_get_dma_addr(struct scic_sds_request *sds_request,
void *virt_addr);
#endif /* _SCI_UTIL_H_ */

196
drivers/scsi/isci/core/scic_sds_request.c
View File

@ -259,56 +259,70 @@ static struct scu_sgl_element_pair *scic_sds_request_get_sgl_element_pair(
* the Scatter-Gather List.
*
*/
void scic_sds_request_build_sgl(
struct scic_sds_request *this_request)
void scic_sds_request_build_sgl(struct scic_sds_request *sds_request)
{
void *os_sge;
void *os_handle;
dma_addr_t physical_address;
u32 sgl_pair_index = 0;
struct scu_sgl_element_pair *scu_sgl_list = NULL;
struct scu_sgl_element_pair *previous_pair = NULL;
struct isci_request *isci_request =
(struct isci_request *)sci_object_get_association(sds_request);
struct isci_host *isci_host = isci_request->isci_host;
struct sas_task *task = isci_request_access_task(isci_request);
struct scatterlist *sg = NULL;
dma_addr_t dma_addr;
u32 sg_idx = 0;
struct scu_sgl_element_pair *scu_sg = NULL;
struct scu_sgl_element_pair *prev_sg = NULL;
os_handle = scic_sds_request_get_user_request(this_request);
scic_cb_io_request_get_next_sge(os_handle, NULL, &os_sge);
if (task->num_scatter > 0) {
sg = task->scatter;
while (os_sge != NULL) {
scu_sgl_list =
scic_sds_request_get_sgl_element_pair(this_request, sgl_pair_index);
while (sg) {
scu_sg = scic_sds_request_get_sgl_element_pair(
sds_request,
sg_idx);
SCU_SGL_COPY(os_handle, scu_sgl_list->A, os_sge);
SCU_SGL_COPY(scu_sg->A, sg);
scic_cb_io_request_get_next_sge(os_handle, os_sge, &os_sge);
sg = sg_next(sg);
if (os_sge != NULL) {
SCU_SGL_COPY(os_handle, scu_sgl_list->B, os_sge);
if (sg) {
SCU_SGL_COPY(scu_sg->B, sg);
sg = sg_next(sg);
} else
SCU_SGL_ZERO(scu_sg->B);
scic_cb_io_request_get_next_sge(os_handle, os_sge, &os_sge);
} else {
SCU_SGL_ZERO(scu_sgl_list->B);
if (prev_sg) {
dma_addr =
scic_io_request_get_dma_addr(
sds_request,
scu_sg);
prev_sg->next_pair_upper =
upper_32_bits(dma_addr);
prev_sg->next_pair_lower =
lower_32_bits(dma_addr);
}
prev_sg = scu_sg;
sg_idx++;
}
} else { /* handle when no sg */
scu_sg = scic_sds_request_get_sgl_element_pair(sds_request,
sg_idx);
if (previous_pair != NULL) {
scic_cb_io_request_get_physical_address(
scic_sds_request_get_controller(this_request),
this_request,
scu_sgl_list,
&physical_address
);
dma_addr = dma_map_single(&isci_host->pdev->dev,
task->scatter,
task->total_xfer_len,
task->data_dir);
previous_pair->next_pair_upper =
upper_32_bits(physical_address);
previous_pair->next_pair_lower =
lower_32_bits(physical_address);
}
isci_request->zero_scatter_daddr = dma_addr;
previous_pair = scu_sgl_list;
sgl_pair_index++;
scu_sg->A.length = task->total_xfer_len;
scu_sg->A.address_upper = upper_32_bits(dma_addr);
scu_sg->A.address_lower = lower_32_bits(dma_addr);
}
if (scu_sgl_list != NULL) {
scu_sgl_list->next_pair_upper = 0;
scu_sgl_list->next_pair_lower = 0;
if (scu_sg) {
scu_sg->next_pair_upper = 0;
scu_sg->next_pair_lower = 0;
}
}
@ -473,17 +487,17 @@ static void scic_sds_task_request_build_ssp_task_iu(
*
*/
static void scu_ssp_reqeust_construct_task_context(
struct scic_sds_request *this_request,
struct scic_sds_request *sds_request,
struct scu_task_context *task_context)
{
dma_addr_t physical_address;
struct scic_sds_controller *owning_controller;
dma_addr_t dma_addr;
struct scic_sds_controller *controller;
struct scic_sds_remote_device *target_device;
struct scic_sds_port *target_port;
owning_controller = scic_sds_request_get_controller(this_request);
target_device = scic_sds_request_get_device(this_request);
target_port = scic_sds_request_get_port(this_request);
controller = scic_sds_request_get_controller(sds_request);
target_device = scic_sds_request_get_device(sds_request);
target_port = scic_sds_request_get_port(sds_request);
/* Fill in the TC with the its required data */
task_context->abort = 0;
@ -492,7 +506,7 @@ static void scu_ssp_reqeust_construct_task_context(
task_context->connection_rate =
scic_remote_device_get_connection_rate(target_device);
task_context->protocol_engine_index =
scic_sds_controller_get_protocol_engine_group(owning_controller);
scic_sds_controller_get_protocol_engine_group(controller);
task_context->logical_port_index =
scic_sds_port_get_index(target_port);
task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP;
@ -500,7 +514,7 @@ static void scu_ssp_reqeust_construct_task_context(
task_context->context_type = SCU_TASK_CONTEXT_TYPE;
task_context->remote_node_index =
scic_sds_remote_device_get_index(this_request->target_device);
scic_sds_remote_device_get_index(sds_request->target_device);
task_context->command_code = 0;
task_context->link_layer_control = 0;
@ -515,61 +529,55 @@ static void scu_ssp_reqeust_construct_task_context(
/* task_context->type.ssp.tag = this_request->io_tag; */
task_context->task_phase = 0x01;
if (this_request->was_tag_assigned_by_user) {
/* Build the task context now since we have already read the data */
this_request->post_context = (
SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC
| (
scic_sds_controller_get_protocol_engine_group(owning_controller)
<< SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT
)
| (
scic_sds_port_get_index(target_port)
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
)
| scic_sds_io_tag_get_index(this_request->io_tag)
);
if (sds_request->was_tag_assigned_by_user) {
/*
* Build the task context now since we have already read
* the data
*/
sds_request->post_context =
(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
(scic_sds_controller_get_protocol_engine_group(
controller) <<
SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
(scic_sds_port_get_index(target_port) <<
SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
scic_sds_io_tag_get_index(sds_request->io_tag));
} else {
/* Build the task context now since we have already read the data */
this_request->post_context = (
SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC
| (
scic_sds_controller_get_protocol_engine_group(owning_controller)
<< SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT
)
| (
scic_sds_port_get_index(target_port)
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
)
/* This is not assigned because we have to wait until we get a TCi */
);
/*
* Build the task context now since we have already read
* the data
*
* I/O tag index is not assigned because we have to wait
* until we get a TCi
*/
sds_request->post_context =
(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
(scic_sds_controller_get_protocol_engine_group(
owning_controller) <<
SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
(scic_sds_port_get_index(target_port) <<
SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT));
}
/* Copy the physical address for the command buffer to the SCU Task Context */
scic_cb_io_request_get_physical_address(
scic_sds_request_get_controller(this_request),
this_request,
this_request->command_buffer,
&physical_address
);
/*
* Copy the physical address for the command buffer to the
* SCU Task Context
*/
dma_addr = scic_io_request_get_dma_addr(sds_request,
sds_request->command_buffer);
task_context->command_iu_upper =
upper_32_bits(physical_address);
task_context->command_iu_lower =
lower_32_bits(physical_address);
task_context->command_iu_upper = upper_32_bits(dma_addr);
task_context->command_iu_lower = lower_32_bits(dma_addr);
/* Copy the physical address for the response buffer to the SCU Task Context */
scic_cb_io_request_get_physical_address(
scic_sds_request_get_controller(this_request),
this_request,
this_request->response_buffer,
&physical_address
);
/*
* Copy the physical address for the response buffer to the
* SCU Task Context
*/
dma_addr = scic_io_request_get_dma_addr(sds_request,
sds_request->response_buffer);
task_context->response_iu_upper =
upper_32_bits(physical_address);
task_context->response_iu_lower =
lower_32_bits(physical_address);
task_context->response_iu_upper = upper_32_bits(dma_addr);
task_context->response_iu_lower = lower_32_bits(dma_addr);
}
/**

9
drivers/scsi/isci/core/scic_sds_request.h
View File

@ -389,14 +389,13 @@ extern const struct scic_sds_io_request_state_handler scic_sds_smp_request_start
* This macro copys the SGL Element data from the host os to the hardware SGL
* elment data
*/
#define SCU_SGL_COPY(os_handle, scu_sge, os_sge) \
#define SCU_SGL_COPY(scu_sge, os_sge) \
{ \
(scu_sge).length = \
scic_cb_sge_get_length_field(os_handle, os_sge); \
(scu_sge).length = sg_dma_len(sg); \
(scu_sge).address_upper = \
upper_32_bits(scic_cb_sge_get_address_field(os_handle, os_sge)); \
upper_32_bits(sg_dma_address(sg)); \
(scu_sge).address_lower = \
lower_32_bits(scic_cb_sge_get_address_field(os_handle, os_sge)); \
lower_32_bits(sg_dma_address(sg)); \
(scu_sge).address_modifier = 0; \
}

117
drivers/scsi/isci/core/scic_sds_smp_request.c
View File

@ -234,37 +234,36 @@ enum sci_status scic_io_request_construct_smp(
*
*/
static void scu_smp_request_construct_task_context(
struct scic_sds_request *this_request,
struct scic_sds_request *sds_request,
struct smp_request *smp_request)
{
dma_addr_t physical_address;
struct scic_sds_controller *owning_controller;
dma_addr_t dma_addr;
struct scic_sds_controller *controller;
struct scic_sds_remote_device *target_device;
struct scic_sds_port *target_port;
struct scu_task_context *task_context;
/* byte swap the smp request. */
scic_word_copy_with_swap(
this_request->command_buffer,
(u32 *)smp_request,
sizeof(struct smp_request) / sizeof(u32)
);
scic_word_copy_with_swap(sds_request->command_buffer,
(u32 *)smp_request,
sizeof(struct smp_request) / sizeof(u32));
task_context = scic_sds_request_get_task_context(this_request);
task_context = scic_sds_request_get_task_context(sds_request);
owning_controller = scic_sds_request_get_controller(this_request);
target_device = scic_sds_request_get_device(this_request);
target_port = scic_sds_request_get_port(this_request);
controller = scic_sds_request_get_controller(sds_request);
target_device = scic_sds_request_get_device(sds_request);
target_port = scic_sds_request_get_port(sds_request);
/*
* Fill in the TC with the its required data
* 00h */
* 00h
*/
task_context->priority = 0;
task_context->initiator_request = 1;
task_context->connection_rate =
scic_remote_device_get_connection_rate(target_device);
task_context->protocol_engine_index =
scic_sds_controller_get_protocol_engine_group(owning_controller);
scic_sds_controller_get_protocol_engine_group(controller);
task_context->logical_port_index =
scic_sds_port_get_index(target_port);
task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SMP;
@ -273,7 +272,8 @@ static void scu_smp_request_construct_task_context(
task_context->context_type = SCU_TASK_CONTEXT_TYPE;
/* 04h */
task_context->remote_node_index = this_request->target_device->rnc->remote_node_index;
task_context->remote_node_index =
sds_request->target_device->rnc->remote_node_index;
task_context->command_code = 0;
task_context->task_type = SCU_TASK_TYPE_SMP_REQUEST;
@ -289,7 +289,8 @@ static void scu_smp_request_construct_task_context(
task_context->address_modifier = 0;
/* 10h */
task_context->ssp_command_iu_length = smp_request->header.request_length;
task_context->ssp_command_iu_length =
smp_request->header.request_length;
/* 14h */
task_context->transfer_length_bytes = 0;
@ -298,59 +299,57 @@ static void scu_smp_request_construct_task_context(
* 18h ~ 30h, protocol specific
* since commandIU has been build by framework at this point, we just
* copy the frist DWord from command IU to this location. */
memcpy((void *)(&task_context->type.smp), this_request->command_buffer, sizeof(u32));
memcpy((void *)(&task_context->type.smp),
sds_request->command_buffer,
sizeof(u32));
/*
* 40h
* "For SMP you could program it to zero. We would prefer that way so that
* done code will be consistent." - Venki */
* "For SMP you could program it to zero. We would prefer that way
* so that done code will be consistent." - Venki
*/
task_context->task_phase = 0;
if (this_request->was_tag_assigned_by_user) {
/* Build the task context now since we have already read the data */
this_request->post_context = (
SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC
| (
scic_sds_controller_get_protocol_engine_group(owning_controller)
<< SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT
)
| (
scic_sds_port_get_index(target_port)
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
)
| scic_sds_io_tag_get_index(this_request->io_tag)
);
if (sds_request->was_tag_assigned_by_user) {
/*
* Build the task context now since we have already read
* the data
*/
sds_request->post_context =
(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
(scic_sds_controller_get_protocol_engine_group(
controller) <<
SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
(scic_sds_port_get_index(target_port) <<
SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
scic_sds_io_tag_get_index(sds_request->io_tag));
} else {
/* Build the task context now since we have already read the data */
this_request->post_context = (
SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC
| (
scic_sds_controller_get_protocol_engine_group(owning_controller)
<< SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT
)
| (
scic_sds_port_get_index(target_port)
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
)
/* This is not assigned because we have to wait until we get a TCi */
);
/*
* Build the task context now since we have already read
* the data.
* I/O tag index is not assigned because we have to wait
* until we get a TCi.
*/
sds_request->post_context =
(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
(scic_sds_controller_get_protocol_engine_group(
controller) <<
SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
(scic_sds_port_get_index(target_port) <<
SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT));
}
/*
* Copy the physical address for the command buffer to the SCU Task Context
* command buffer should not contain command header. */
scic_cb_io_request_get_physical_address(
scic_sds_request_get_controller(this_request),
this_request,
((char *)(this_request->command_buffer) + sizeof(u32)),
&physical_address
);
task_context->command_iu_upper =
upper_32_bits(physical_address);
task_context->command_iu_lower =
lower_32_bits(physical_address);
* Copy the physical address for the command buffer to the SCU Task
* Context command buffer should not contain command header.
*/
dma_addr = scic_io_request_get_dma_addr(sds_request,
(char *)
(sds_request->command_buffer) +
sizeof(u32));
task_context->command_iu_upper = upper_32_bits(dma_addr);
task_context->command_iu_lower = lower_32_bits(dma_addr);
/* SMP response comes as UF, so no need to set response IU address. */
task_context->response_iu_upper = 0;

20
drivers/scsi/isci/core/scic_sds_stp_packet_request.c
View File

@ -253,30 +253,26 @@ enum sci_status scic_sds_stp_packet_request_process_status_fis(
*
*/
void scic_sds_stp_packet_internal_request_sense_build_sgl(
struct scic_sds_request *this_request)
struct scic_sds_request *sds_request)
{
void *sge;
struct scu_sgl_element_pair *scu_sgl_list = NULL;
struct scu_task_context *task_context;
dma_addr_t physical_address;
dma_addr_t dma_addr;
struct sci_ssp_response_iu *rsp_iu =
(struct sci_ssp_response_iu *)this_request->response_buffer;
(struct sci_ssp_response_iu *)sds_request->response_buffer;
sge = (void *)&rsp_iu->data[0];
task_context = (struct scu_task_context *)this_request->task_context_buffer;
task_context =
(struct scu_task_context *)sds_request->task_context_buffer;
scu_sgl_list = &task_context->sgl_pair_ab;
scic_cb_io_request_get_physical_address(
scic_sds_request_get_controller(this_request),
this_request,
((char *)sge),
&physical_address
);
dma_addr = scic_io_request_get_dma_addr(sds_request, sge);
scu_sgl_list->A.address_upper = sci_cb_physical_address_upper(physical_address);
scu_sgl_list->A.address_lower = sci_cb_physical_address_lower(physical_address);
scu_sgl_list->A.address_upper = upper_32_bits(dma_addr);
scu_sgl_list->A.address_lower = lower_32_bits(dma_addr);
scu_sgl_list->A.length = task_context->transfer_length_bytes;
scu_sgl_list->A.address_modifier = 0;

95
drivers/scsi/isci/core/scic_sds_stp_request.c
View File

@ -175,17 +175,17 @@ void scic_sds_stp_request_assign_buffers(
* determine what is common for SSP/SMP/STP task context structures.
*/
static void scu_sata_reqeust_construct_task_context(
struct scic_sds_request *this_request,
struct scic_sds_request *sds_request,
struct scu_task_context *task_context)
{
dma_addr_t physical_address;
struct scic_sds_controller *owning_controller;
dma_addr_t dma_addr;
struct scic_sds_controller *controller;
struct scic_sds_remote_device *target_device;
struct scic_sds_port *target_port;
owning_controller = scic_sds_request_get_controller(this_request);
target_device = scic_sds_request_get_device(this_request);
target_port = scic_sds_request_get_port(this_request);
controller = scic_sds_request_get_controller(sds_request);
target_device = scic_sds_request_get_device(sds_request);
target_port = scic_sds_request_get_port(sds_request);
/* Fill in the TC with the its required data */
task_context->abort = 0;
@ -194,7 +194,7 @@ static void scu_sata_reqeust_construct_task_context(
task_context->connection_rate =
scic_remote_device_get_connection_rate(target_device);
task_context->protocol_engine_index =
scic_sds_controller_get_protocol_engine_group(owning_controller);
scic_sds_controller_get_protocol_engine_group(controller);
task_context->logical_port_index =
scic_sds_port_get_index(target_port);
task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_STP;
@ -202,7 +202,7 @@ static void scu_sata_reqeust_construct_task_context(
task_context->context_type = SCU_TASK_CONTEXT_TYPE;
task_context->remote_node_index =
scic_sds_remote_device_get_index(this_request->target_device);
scic_sds_remote_device_get_index(sds_request->target_device);
task_context->command_code = 0;
task_context->link_layer_control = 0;
@ -219,53 +219,50 @@ static void scu_sata_reqeust_construct_task_context(
(sizeof(struct sata_fis_reg_h2d) - sizeof(u32)) / sizeof(u32);
/* Set the first word of the H2D REG FIS */
task_context->type.words[0] = *(u32 *)this_request->command_buffer;
task_context->type.words[0] = *(u32 *)sds_request->command_buffer;
if (this_request->was_tag_assigned_by_user) {
/* Build the task context now since we have already read the data */
this_request->post_context = (
SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC
| (
scic_sds_controller_get_protocol_engine_group(owning_controller)
<< SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT
)
| (
scic_sds_port_get_index(target_port)
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
)
| scic_sds_io_tag_get_index(this_request->io_tag)
);
if (sds_request->was_tag_assigned_by_user) {
/*
* Build the task context now since we have already read
* the data
*/
sds_request->post_context =
(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
(scic_sds_controller_get_protocol_engine_group(
controller) <<
SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
(scic_sds_port_get_index(target_port) <<
SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
scic_sds_io_tag_get_index(sds_request->io_tag));
} else {
/* Build the task context now since we have already read the data */
this_request->post_context = (
SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC
| (
scic_sds_controller_get_protocol_engine_group(owning_controller)
<< SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT
)
| (
scic_sds_port_get_index(target_port)
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
)
/* This is not assigned because we have to wait until we get a TCi */
);
/*
* Build the task context now since we have already read
* the data.
* I/O tag index is not assigned because we have to wait
* until we get a TCi.
*/
sds_request->post_context =
(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
(scic_sds_controller_get_protocol_engine_group(
controller) <<
SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
(scic_sds_port_get_index(target_port) <<
SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT));
}
/*
* Copy the physical address for the command buffer to the SCU Task Context
* We must offset the command buffer by 4 bytes because the first 4 bytes are
* transfered in the body of the TC */
scic_cb_io_request_get_physical_address(
scic_sds_request_get_controller(this_request),
this_request,
((char *)this_request->command_buffer) + sizeof(u32),
&physical_address
);
* Copy the physical address for the command buffer to the SCU Task
* Context. We must offset the command buffer by 4 bytes because the
* first 4 bytes are transfered in the body of the TC.
*/
dma_addr =
scic_io_request_get_dma_addr(sds_request,
(char *)sds_request->
command_buffer +
sizeof(u32));
task_context->command_iu_upper =
upper_32_bits(physical_address);
task_context->command_iu_lower =
lower_32_bits(physical_address);
task_context->command_iu_upper = upper_32_bits(dma_addr);
task_context->command_iu_lower = lower_32_bits(dma_addr);
/* SATA Requests do not have a response buffer */
task_context->response_iu_upper = 0;